linux-kernel - [PATCH v2 1/2] USB-FHCI: Use a signed return type for fhci_create

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Date:	Tue, 22 Dec 2015 16:51:42 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	linux-usb@...r.kernel.org,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH v2 1/2] USB-FHCI: Use a signed return type for
 fhci_create_ep()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 22 Dec 2015 16:10:14 +0100

The return type "u32" was used by the fhci_create_ep() function even though
it will eventually return a negative error code.
Improve this implementation detail by using the type "int" instead.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/usb/host/fhci-tds.c | 2 +-
 drivers/usb/host/fhci.h     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/fhci-tds.c b/drivers/usb/host/fhci-tds.c
index f82ad5d..fc0b525 100644
--- a/drivers/usb/host/fhci-tds.c
+++ b/drivers/usb/host/fhci-tds.c
@@ -149,7 +149,7 @@ void fhci_ep0_free(struct fhci_usb *usb)
  * data_mem	The data memory partition(BUS)
  * ring_len	TD ring length
  */
-u32 fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
+int fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
 			   u32 ring_len)
 {
 	struct endpoint *ep;
diff --git a/drivers/usb/host/fhci.h b/drivers/usb/host/fhci.h
index 154e6a0..afa3cfc 100644
--- a/drivers/usb/host/fhci.h
+++ b/drivers/usb/host/fhci.h
@@ -547,7 +547,7 @@ u32 fhci_host_transaction(struct fhci_usb *usb, struct packet *pkt,
 void fhci_host_transmit_actual_frame(struct fhci_usb *usb);
 void fhci_tx_conf_interrupt(struct fhci_usb *usb);
 void fhci_push_dummy_bd(struct endpoint *ep);
-u32 fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
+int fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
 		   u32 ring_len);
 void fhci_init_ep_registers(struct fhci_usb *usb,
 			    struct endpoint *ep,
-- 
2.6.3

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